A fever of 102.9f without the clinical context, is like a fish out of water. You really need to give additional information to get any useful answer from us...Was this taken by mouth? How were you feeling at the time? Were you sweaty? Were you feeling absolutely fine at the time? Do you have an open cut, sore, rash?

In brief:
Treat the number?

Advice: doctors treat patients and not numbers.

A fever of 102.9f without the clinical context, is like a fish out of water. You really need to give additional information to get any useful answer from us...Was this taken by mouth? How were you feeling at the time? Were you sweaty? Were you feeling absolutely fine at the time? Do you have an open cut, sore, rash?
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